JP2741877B2 - Fluorescent lamp - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluorescent lamp used for a light-emitting element of a large-sized color image display device.

2. Description of the Related Art A fluorescent lamp as shown in FIG. 5 has been proposed in Japanese Patent Application Laid-Open No. 61-55851 as a light emitting device having a plurality of picture elements used in a large-sized color video display device. In this figure, discharge spaces 16a, 16b, 16c form one picture element, and discharge spaces 17a, 17b, 17c form another picture element.

In FIG. 5, reference numeral 18 denotes an electrode, and 19 denotes an electrode filament.

However, in the configuration as shown in FIG. 5, when this fluorescent lamp is used as a light emitting element of a large-sized color image display device, since the outer shape is hexagonal, a method of arranging the lamp on a screen is required. And its assembly is not easy. In addition, in such a lamp shape, the discharge path is generally rod-shaped, so that the ratio of the light emitting area to the lamp area is small, and the light emission luminance is reduced. Further, in the configuration shown in FIG. 5, since thermions are supplied around the axis of the filament coil, a discharge space in which the axis of the discharge space is not orthogonal to the axis of the filament coil is generated. The supply of thermoelectrons to the space tends to be uneven. For this reason, a non-uniform discharge sustaining voltage is caused, and luminance unevenness is likely to occur.

The present invention has been made in order to solve such problems, the lamp arrangement on the screen is simple and easy to assemble, the ratio of the light emitting area to the lamp area is large, high brightness, and An object of the present invention is to provide a fluorescent lamp in which uneven brightness is prevented.

Means for Solving the Problems In order to solve this problem, the fluorescent lamp of the present invention has a rectangular parallelepiped airtight container main body having a light-transmitting front plate, and is integrated with the bottom center of the airtight container main body. An airtight container is formed from the electrode filament housing portion, and a plurality of discharge spaces are formed by providing a grid-like partition in the airtight container body. Each of the discharge spaces and the electrodes is formed at the center of the bottom surface of the airtight container body. A hole for communicating with a space portion of the filament storage portion is provided independently, and a single electrode filament provided in the electrode filament storage portion is connected to each of the discharge spaces of the hermetic container main body by a shaft of the electrode filament. While arranged in a direction perpendicular to the axis of, the electrodes are provided at the ends of the discharge spaces farthest from the holes, respectively.
By forming a plurality of discharge paths between a single electrode filament and a plurality of the electrodes, and applying a phosphor emitting red, green, and blue light to each of the discharge spaces of the hermetic container body, respectively. , A discharge space that emits red light, a discharge space that emits green light, and a discharge space that emits blue light.

When the fluorescent lamp of the present invention is used, for example, as a light-emitting element of a large-sized color image display device, the shape of the airtight container body is a rectangular parallelepiped. Since the area ratio is large, high brightness is obtained.Moreover, since the electrode filaments are arranged in any discharge path in a direction perpendicular to this axis, the supply of thermoelectrons to each discharge space becomes uniform. Therefore, the discharge sustaining voltage is made uniform, and uneven brightness can be prevented.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is an exploded perspective view of a fluorescent lamp according to an embodiment of the present invention, and FIG. 2 is a front view thereof.

As shown in FIG. 1, a fluorescent lamp according to an embodiment of the present invention includes a rectangular parallelepiped airtight container body 1 made of a ceramic container, a front plate 2 made of a glass plate sealed with a low-melting glass on the front surface thereof, and An airtight container is constituted by an electrode filament housing portion 4 made of a glass tube, one end of which is sealed with a low melting point glass in a hole 3 formed on the rear surface of the airtight container body 1 and the other end of which is sealed. In the airtight container main body 1, a partition wall 5 is provided by being integrally formed in a lattice shape,
Six discharge spaces 6a, 6b, 6c, 7a, 7b, 7c are formed.
At the center of the bottom surface of the hermetic container body 1, that is, at one end of each discharge space, small holes 8 are independently provided as shown in FIG. The space of the electrode filament housing 4 is communicated with the space. In the vicinity of these holes, the electrode filament housing 4
A coil-shaped electrode filament 9 provided inside is supported and arranged by two internal introduction lines 10. The two internal introduction lines 10 are supported by a stem 11, and external introduction lines 13 are connected to these. Incidentally, reference numeral 12 denotes an exhaust pipe. Electrodes 14a, 14b, 14c, 15a, 15b,
15c, the electrode filament 9 and the electrodes 14a, 14b, 1
A plurality of discharge paths are formed between 4c, 15a, 15b, and 15c. The axis of the electrode filament 9 is the discharge space 6a, 6b, 6c, 7
It is provided in a direction orthogonal to the axes of a, 7b, and 7c. Mercury and a rare gas are sealed in the airtight container.

Rare earth phosphors that emit green (G) light on the ceramic walls forming the discharge spaces 7a, 7a on the portions serving as the respective discharge paths of the hermetic container body 1, and the ceramics forming the discharge spaces 6b, 7b. A rare earth phosphor emitting red (R) is applied to the wall surface, and a rare earth phosphor emitting blue (B) is applied to the ceramic wall forming the discharge spaces 6c and 7c.

As described above, the discharge spaces 6a, 6b, and 6c form one picture element, and the discharge spaces 7a, 7b, and 7c form another picture element.

A current is passed through the electrode filament (cathode) 9 of such a light emitting element, and each electrode (anode) 14a, 14b, 14c, 15a, 15b, 15c
Select and apply the voltage required to start the discharge to
By changing the current flowing through each discharge path, chromaticity within the range shown in FIG. 3 could be obtained. As can be seen, the color reproducibility is almost the same as the color reproduction of the currently used color TV.

Further, it was also recognized that when these currents were temporally changed, the luminance changed following the change.

Such a result means that the light emitting element can be used for displaying a color image.

Then, when the luminance of such a light emitting element was compared with that of a light emitting element having a conventional configuration as shown in FIG. In contrast, the brightness was about 1.3 times. When many such light emitting elements are arranged in the arrangement shown in FIG. 4, the number of elements per unit area can be increased by about 1.3 times as compared with the conventional light emitting elements. Since the arrangement of the elements only needs to consider the vertical relationship of the elements, the arrangement is extremely simple as compared with the elements shown in FIG. Further, the discharge sustaining voltage in each discharge space was uniform, and there was no luminance unevenness.

As described above, the present invention provides a fluorescent lamp in which the arrangement of lamps on a screen is extremely simple, the ratio of the light emitting area to the lamp area is large, high luminance is obtained, and luminance is not uneven. Is what you can do.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a fluorescent lamp according to one embodiment of the present invention, FIG. 2 is a front view of the same, FIG. 3 is a chromaticity diagram showing a luminescent color region of the fluorescent lamp according to the present invention, and FIG. FIG. 5 is a view showing an arrangement example when the fluorescent lamp according to the present invention is used for displaying a color image, and FIG. 5 is a view for explaining a conventional fluorescent lamp. 1 ... airtight container main body, 2 ... front plate, 3 ... hole, 4 ...
Electrode filament storage part, 5 ... partition, 6a, 6b, 6c, 7a, 7
b, 7c, ... discharge space, 8 ... hole, 9 ... electrode filament, 14a, 14b, 14c, 15a, 15b, 15c ... electrode.

Claims (1)

(57) [Claims] An airtight container is formed from a rectangular parallelepiped airtight container main body having a light-transmitting front plate and an electrode filament storage unit integrated at the center of the bottom surface of the airtight container main body. A plurality of discharge spaces are formed by providing a grid-like partition wall inside, and holes for communicating each discharge space and the space portion of the electrode filament storage portion are independently provided at the center of the bottom surface of the hermetic container body. And a single electrode filament provided in the electrode filament accommodating portion, while the axis of the electrode filament is arranged in a direction perpendicular to the axis of each discharge space of the hermetic container body, An electrode is provided at an end remote from the hole, a plurality of discharge paths are formed between a single electrode filament and a plurality of the electrodes, and each discharge path of the hermetic container body is provided. By applying phosphors that emit red, green, and blue light to the space, a plurality of picture elements including a discharge space that emits red light, a discharge space that emits green light, and a discharge space that emits blue light are provided. A fluorescent lamp.